NDLI: Optimization of nonlinear PI controllers for chemical processes

Content Provider	IEEE Xplore Digital Library
Author	Wright, R.A. Kazantzis, N. Kravaris, C.
Copyright Year	1998
Description	Author affiliation: Dow Chem. Co., Midland, MI, USA (Wright, R.A.)
Abstract	Linear PI controllers are the most popular method for controlling chemical processes due to their simplicity in implementation and understanding. Model-based controllers arising from linear first-order models are exactly linear PI. For nonlinear processes, the application and tuning of linear PI controllers can be problematic, if the nonlinearity is severe enough. The extension of linear PI concepts to develop a nonlinear PI control law can lead to many alternative forms, since the term nonlinear PI does not specify the form of the control law; it only specifies that the control law is not linear. Most prior work has suggested ad hoc modifications of the controller parameters as functions of the error, or parameter scheduling, or both. More recently, it has been shown that nonlinear model-based controllers synthesized from nonlinear first-order systems are exactly nonlinear PI. The present work defines a large class of nonlinear PI controllers which can be either model-based or ad hoc and suggests approaches for their optimal tuning.
Starting Page	328
Ending Page	332
File Size	384058
Page Count	5
File Format	PDF
ISBN	0780345304
ISSN	07431619
DOI	10.1109/ACC.1998.694685
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Process control Chemical processes Error correction Optimal control Nonlinear control systems Chemical engineering Force control Integral equations Pi control Control system synthesis
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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